// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package schemavalidation

import (
	"fmt"

	"github.com/xeipuuv/gojsonschema"
	"sigs.k8s.io/yaml"
)

func Validate(document, schema []byte) error {
	documentAsYaml, err := yaml.YAMLToJSON(document)
	if err != nil {
		return fmt.Errorf("unable to parse YAML: %s", err.Error())
	}
	documentLoader := gojsonschema.NewBytesLoader(documentAsYaml)
	schemaLoader := gojsonschema.NewBytesLoader(schema)
	result, err := gojsonschema.Validate(schemaLoader, documentLoader)
	if err != nil {
		return fmt.Errorf("unable to validate: %v", err)
	}
	if !result.Valid() {
		return fmt.Errorf("document is not valid: %v", result.Errors())
	}
	return nil
}
